/diy/ - Do It Yourself

I am trying to use interrupts and volatile variables but I think somehow avr gcc is still optimizing stuff

Pic related is my interrupt code and it updates g_curDmaBuff which is a volatile. And later in a loop I am checking g_curDmaBuff like this


while(pxEnd > g_curDmaBuff);

Which should eventually become true but it doesn't. It works if I do this

while(pxEnd > g_curDmaBuff) delay(0);

So delay(0) probably un-optimize g_curDmaBuff

What am I missing?